Nut-lock.



No. 761,738. PATENTED JUNE 7. 1904.

' E. M. WHITE.

NUT LOOK.

APPLIOATION FILED HEP T. 8, 1902.

' H0 KODEL.

wit u aooeo UNITED STATES Patented June '7, 1904.

EDIVIN M. WVHITE, OF PITTSBURG, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent N0. 761,738, dated June 7, 1904.

Application filed September 8,1902- Serial No. l2Z,585. (N model.)

To tZZ whom it may concern.-

Be it known that I, EDWIN M. WHITE, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Nut-Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to nut-locks.

The object of the invention is to provide a washer by means of which nuts may be securely locked to their bolts and be prevented from becoming accidentally displaced, the washer being of such construction, however,

as to permit, when desired, of the ready removal of the nut.

With this and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, which will be hereinafter fully described, and particularly pointed out in the appended claim.

In the accompanying drawings, Figure 1 is a front view showing my improved. washelxengaged by a nut threaded upon a bolt and before the locking-arm has been bent to engage the nut. Fig. 2 is a top plan View of the same. Fig. 3 is a view similar to Fig. 2 after the arm has been bent to engage the nut previous to forcing it into locked engagement with the nut. Fig. 4 is a view showing the arm sprung into locked engagement with the nut. Fig. 5 is a view similar to Fig. 1, showing the arm in locked engagement with the nut.

Referring to the drawings, 1 denotes the bolt, and 2 the nut. I

3 denotes the washer, the lower edge of which is shaped to engage a fixed part, thereby to be prevented from turning. One side of the washer, preferably at its upper corner, is provided with a flexible arm 5, which is adapted to be bent into the position shown in Figs. 3 and 4 to engage the nut, and thereby prevent its turning. The arm is first bent, as shown in Fig. 3, until its end touches the nut. In this position the arm willbe at an angle to the washer, and a further pressure upon the arm is used to force it parallel with the washer, so that the arm will be in a straight line parallel to the washer proper and be prevented from being accidentally sprung outwardly.

In nut-locks heretofore constructed in which a portion of the plate or washer has been bent up to engage with the side of the nut so much of it has been bent up as to interfere with the application of the wrench in removing the nut-unless the tongue or engaging portion of the look was bent out substantially straight or so far as to endanger the breaking of the tongue, or the tongue has been arranged to engage with the portion of the nut substantially radially with its center which will cause the strain on the tip or engaging end of the tongue to be exerted laterally, thus detract ing from its efficiency or requiring heavier material than when the strain is applied to the tongue in the line of its length, which can only be done by having the tip of the tongue bear on one corner of the nut or tangentially the rotation ofthe nut. An other advantage arising from the location of the tongue at one corner of the plate or washer, which is preferably substantially rectangular, is that it per- -mits of forming what I shall call the inner edge on an angle for inclination from a point about the center of the bolt-opening to the tip, which affords plenty of room for the application of the wrench to that face of the nut for its removal without the necessity of bending the tongue out of the way except to spring its tip outward sufficiently to let the corner of the nut pass under it. importance when the nut has been turned up very tight or has been on so long as to have become rusted or diflicult to start, and the nut is so situated as to prevent the application of the wrench to its other sides.

If it be desired to remove the nut,'the arm may be bent outwardly to free it from the nut, and thus permit of the re'adyremoval of the nut. The washer may now be placed upon any other bolt to which it is desired to lock a nut and may be used for an indefinite number of times.

From the foregoing description, taken in connection with the accompanying drawings,

This becomes of l flexible arm, the inner edge of the arm being inclined from a point about the center of the perforation to the tip, whereby the arm may be folded back to cause its tip to engage with one edge of the nut and yet leave room thereon for the engagement of a wrench.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

Witnesses J. MoC. Loomnurr, G. M. NooNAN. 

